The in-house Nugget jewellery brand is available exclusively in the Rangger Goldsmith Studio. Having been officially registered as a brand with the number AM 6663/99 Cl.14 and the brand registration number 191453 in 1999, three hallmarks in each piece of jewellery ensure its originality. The fineness hallmark indicates the alloy of the piece of jewellery with a number. The name hallmark affirms the indicated value and the originality of the piece of jewellery through the emblem of the Rangger Goldsmith Studio and the initials of the master goldsmith Karl Rangger. In the Nugget jewellery pieces, a hallmark with the Nugget lettering is placed.